Electrode element for storage batteries.



T. A. rzmson. ELECTRODE ELEMENT FOE STORAGE BATTERIES.

APPLICATION FILED FEB. 6, 1908.

940,635. Patented Nov.16,1909.

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THOMAS A. EDISON, OF LLEWELLYN PARK, ORANGE, NEW JERSEY, ASSIGNOR TO EDISON STORAGE BATTERY COMPANY, OF WEST ORANGE, NEW JERSEY, A CORPORA- TION or new JERSEY.

ELECTRODE ELEMENT FOR STORAGE BATTERIES.

Specification of Letters Patent. I Patented NOV. 16, 1909.

Original application filed November 2, 1905, Serial No. 285,650. Divided and this application filed February 6, 1908. Serial No. 414,574.-

My object 15 to provide a perforated tubular normally non-deformable electrode element, containing active material maintained under pressure therein, and which shall be very strong and rigid, and capable of with standing enormous bursting strains.

In order that theinvention may be better understood, attention isdirected to the accompanying drawing, forming part of this specification, and in which Figure 1 isa side view of the improved electrode element; and Fig. 2 a cross-sectional view of the same on an enlarged scale, and with the active material removed. In both of these views, corresponding arts are represented by the same numerals 0 reference.

Each electrode element 1, is composed of a tube made referably of a strip of steel about .004 0 an inch in thickness, each tube being of a length of about 4 inches, and of an internal diameter of about inch. .The strip, before being formed into tubular shape, is provided with closely arranged perforations 2 therein. as shown. The joint In order to secure greater strength to per mit the tube to resist enormous bursting strains, the joint 3 extends spirally with relation .to the tube. The active materiald (appearing through the perforations 2 in Fig. 1) is introduced within the tube in any suitable way under great pressure, and the ends 5 are turned over, as shown. In order to further strengthen the tubes, I .)referably provide thein with a number of seamless nickel rings (5, fitting the tubes snugly.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is as follows 1. An electrode element comprising a persubstantially as and for the purposes set forth.

2. An electrode element com rising a perforated'tubular inclosing pocliet composed of a strip of steel, non-deformable under normal working conditions, containing a highl compressed mass of active material, and ormed with-a spirally arranged joint, and provided with a series of encircling rings, substantially as and for the purposes set forth.

This specification signed and witnessed this 4th day of Feby. 1908.

THOS. A. EDISON.

Witnesses:

ANNA R. KLEHM, FRANK L. DYER. 

